CN109462227A - One kind being based on primary frequency modulation rapidity evaluation method - Google Patents
One kind being based on primary frequency modulation rapidity evaluation method Download PDFInfo
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- CN109462227A CN109462227A CN201811239467.6A CN201811239467A CN109462227A CN 109462227 A CN109462227 A CN 109462227A CN 201811239467 A CN201811239467 A CN 201811239467A CN 109462227 A CN109462227 A CN 109462227A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/381—Dispersed generators
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2203/00—Indexing scheme relating to details of circuit arrangements for AC mains or AC distribution networks
- H02J2203/20—Simulating, e g planning, reliability check, modelling or computer assisted design [CAD]
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Abstract
The present invention relates to one kind to be based on primary frequency modulation rapidity evaluation method, and response calculates within 15 seconds, and the calculating of theoretical value, as reference, considers the hysteresis of unit frequency quick response using the mean value of preceding 15 seconds frequencies variation；Response calculates within 30 seconds, and the calculating of theoretical value, as reference, avoids falling bring analytical error after rise because of frequency using the peak value of preceding 30 seconds frequencies variation.In the present invention, in order to avoid frequently calculating, according to previous unit frequency modulation test feature, frequency modulation rapid charater can fully demonstrate after 15s, so setting evaluation period shortest length, can be improved the reasonability of statistical data；Unit is calculated over 15s and is not up to 30 seconds, replaces two item datas only with 15 seconds calculating data；If sampling duration exceeds 30 seconds, epicycle, which is calculated, to be fallen after rise according to actual frequency to could terminate in dead zone, and theoretical action value will be referred to the peak value of entire period.
Description
Technical field
The invention belongs to frequency modulation rapidity assessment technique fields, are evaluated more particularly, to one kind based on primary frequency modulation rapidity
Method.
Background technique
As load growth and power grid scale increasingly increase, extra-high voltage grid and interconnection power system under the new situation,
Unit primary frequency function can be obviously improved frequency quality of power grid with the mutation of quick response grid power, pacify in power grid
Very important effect is played in full stable operation.Correlated performance analysis work is not carried out in the evaluation of primary frequency modulation rapidity at present
Make, primary frequency modulation analysis of experiments relies primarily on test data summary and obtains, fails to embody unit real time execution situation, especially in electricity
During net frequency fluctuation, frequency modulation rapidity analysis cannot be carried out with authentic and valid data, longer data collection phase and layer by layer
Reporting mechanism misses the opportunity of optimized analysis data, and subjective factor is analyzed or had to data, causes for primary frequency modulation analysis all
It is mostly difficult, one kind being proposed based on primary frequency modulation rapidity evaluation method, to analyse generating set frequency modulation rapidity scientifically based on this
Research provides significant data.
Summary of the invention
It is an object of the invention to overcome the deficiencies of the prior art and provide the data-handling capacities powerful using control system
Come solve previous frequcny modulation data not in time, use historical storage mode and search function for further research frequency modulation characteristic provide according to
According to one kind be based on primary frequency modulation rapidity evaluation method.
Specific technical solution of the present invention is as follows:
One kind being based on primary frequency modulation rapidity evaluation method, it is characterised in that: the following steps are included:
(1) the grid-connected power generator turbine revolving speed of timing acquiring, is converted to mains frequency for revolving speed；
(2) the deviation of mains frequency and standard frequency is calculated, and result is subjected to signed magnitude arithmetic(al)；
(3) when absolute value of the bias is greater than the set value, then next step is entered；
Otherwise, step is returned to (1)；
(4) when absolute value of the bias is reduced to setting value, this Phase Evaluation terminates, minute book phases-time length；Otherwise, after
Continuous timing；
(5) when time span is greater than 15 seconds, the data of this phase acquisition are analyzed, obtain evaluation number；
When time span is less than or equal to 15 seconds, step is returned to (1)；
Setting value is 0.034Hz；
Turbine speed w is converted to mains frequency f:f=w/60；
Mains frequency f and standard frequency f0 absolute value of the bias: Δ f=∣ f-f0 ∣；
Time span h: stop from absolute value of the bias Δ f is greater than the 0.034Hz moment to less than equal to the 0.034Hz moment；
Electricity contributes deviation: Δ p=p-p0；
Electricity contributes 15 seconds peak values: Δ pm15=max ∣ Δ p15 ∣, and wherein Δ p15 indicates that value range is Δ in first 15 seconds
P data；
Electricity contributes 30 seconds peak values: Δ pm30=max ∣ Δ p30 ∣, and wherein Δ p30 indicates that value range is Δ in first 30 seconds
P data；
Unit rated power is pe, unit MW；
Electricity contributes 75 theoretical peaks: W75=0.3* Δ f1*pe, and wherein Δ f1 is preceding 15 seconds frequency difference average value；
Electricity contributes 90 theoretical peaks: W90=0.36* Δ f2*pe, and wherein Δ f2 is entire evaluation period maximum value；
When mains frequency is greater than standard frequency, electricity contributes 15 seconds peak delta pm15 for negative and when absolute value is greater than W75,
Primary frequency modulation 15 seconds correct action frequency k1 of meter increase by 1 time, and 15 seconds malfunction number k2 of primary frequency modulation are constant；Electricity contribution 15
Second peak delta pm15 is positive number or when absolute value is less than W75, and k1 is constant, and k2 increases primary；
When mains frequency is less than standard frequency, electricity contributes 15 seconds peak delta pm15 for positive number and when absolute value is greater than W75,
K1 increases by 1 time, and k2 is constant；Electricity contributes 15 seconds peak delta pm15 to be negative or when absolute value is less than W75, and k1 is constant, and k2 increases
Add primary；
When mains frequency is greater than standard frequency, electricity contributes 30 seconds peak delta pm30 for negative and when absolute value is greater than W90,
Primary frequency modulation 30 seconds correct action frequency k3 of meter increase by 1 time, and 30 seconds malfunction number k4 of primary frequency modulation are constant；Electricity contribution 30
Second peak delta pm30 is positive number or when absolute value is less than W90, and k3 is constant, and k4 increases primary；
When mains frequency is less than standard frequency, electricity contributes 30 seconds peak delta pm30 for positive number and when absolute value is greater than W90,
K3 increases by 1 time, and k4 is constant；Electricity contributes 30 seconds peak delta pm30 to be negative or when absolute value is less than W90, and k3 is constant, and k4 increases
Add primary；
15 seconds performance factor B=k1/ (k1+k2) of primary frequency modulation；
30 seconds performance factor C=k3/ (k3+k4) of primary frequency modulation, evaluation period h are higher than 15 seconds and are lower than 30 seconds, 30 seconds
Performance factor not counts.
The advantages of the present invention are:
In the present invention, previous examination is solved using the powerful data-handling capacity of control system by rapidity evaluation method
It is not perfect to test data, search function can be used, provides foundation for further research frequency modulation characteristic；Response calculates within 15 seconds, reason
The hysteresis of unit frequency quick response is considered as reference using the mean value of preceding 15 seconds frequencies variation by the calculating of value；30 seconds
Response calculates, and the calculating of theoretical value, as reference, avoids falling bring after rise because of frequency using the peak value of preceding 30 seconds frequencies variation
Analytical error；In order to avoid frequently calculating, according to previous unit frequency modulation test feature, frequency modulation rapid charater can after 15s
It fully demonstrates, so setting evaluation period shortest length, can be improved the reasonability of statistical data；Unit is calculated over 15s not
Reach 30 seconds, replaces two item datas only with 15 seconds calculating data；If sampling duration exceed 30 seconds, epicycle calculate according to
Actual frequency is fallen after rise to could terminate in dead zone, and theoretical action value will be referred to the peak value of entire period.
Detailed description of the invention
Fig. 1 is the example plot of each data.
Specific embodiment
The present invention is described in further detail by following embodiment, but the technology contents that are described of the present embodiment be it is illustrative,
Without being restrictive, protection scope of the present invention should not be limited to according to this.
One kind being based on primary frequency modulation rapidity evaluation method, and innovation of the invention is: the following steps are included:
(1) the grid-connected power generator turbine revolving speed of timing acquiring, is converted to mains frequency for revolving speed；
(2) the deviation of mains frequency and standard frequency is calculated, and result is subjected to signed magnitude arithmetic(al)；
(3) when absolute value of the bias is greater than the set value, then next step is entered；
Otherwise, step is returned to (1)；
(4) when absolute value of the bias is reduced to setting value, this Phase Evaluation terminates, minute book phases-time length；Otherwise, after
Continuous timing；
(5) when time span is greater than 15 seconds, the data for analyzing this phase acquisition include data sampling time length h, wattful power
Rate p, power instruction p0 etc.), obtain evaluation number (including 15 seconds movement accuracy B of primary frequency modulation, primary frequency modulation 30 seconds movement just
True rate C etc.)；
When time span is less than or equal to 15 seconds, step is returned to (1)；
Setting value is 0.034Hz；
Turbine speed w is converted to mains frequency f:f=w/60；
Mains frequency f and standard frequency f0 absolute value of the bias: Δ f=∣ f-f0 ∣；
Time span h: stop from absolute value of the bias Δ f is greater than the 0.034Hz moment to less than equal to the 0.034Hz moment；
Electricity contributes deviation: Δ p=p-p0；Electricity contributes 15 seconds peak values: Δ pm15=max ∣ Δ p15 ∣, wherein Δ
P15 indicates that value range is Δ p data in first 15 seconds；Electricity contributes 30 seconds peak values: Δ pm30=max ∣ Δ p30 ∣, wherein Δ
P30 indicates that value range is Δ p data in first 30 seconds；
Unit rated power is pe, unit MW；
Electricity contributes 75 theoretical peaks: W75=0.3* Δ f1*pe, and wherein Δ f1 is preceding 15 seconds frequency difference average value；
Electricity contributes 90 theoretical peaks: W90=0.36* Δ f2*pe, and wherein Δ f2 is entire evaluation period maximum value；
When mains frequency is greater than standard frequency, electricity contributes 15 seconds peak delta pm15 for negative and when absolute value is greater than W75,
Primary frequency modulation 15 seconds correct action frequency k1 of meter increase by 1 time, and 15 seconds malfunction number k2 of primary frequency modulation are constant；Electricity contribution 15
Second peak delta pm15 is positive number or when absolute value is less than W75, and k1 is constant, and k2 increases primary；
When mains frequency is less than standard frequency, electricity contributes 15 seconds peak delta pm15 for positive number and when absolute value is greater than W75,
K1 increases by 1 time, and k2 is constant；Electricity contributes 15 seconds peak delta pm15 to be negative or when absolute value is less than W75, and k1 is constant, and k2 increases
Add primary；
When mains frequency is greater than standard frequency, electricity contributes 30 seconds peak delta pm30 for negative and when absolute value is greater than W90,
Primary frequency modulation 30 seconds correct action frequency k3 of meter increase by 1 time, and 30 seconds malfunction number k4 of primary frequency modulation are constant；Electricity contribution 30
Second peak delta pm30 is positive number or when absolute value is less than W90, and k3 is constant, and k4 increases primary；
When mains frequency is less than standard frequency, electricity contributes 30 seconds peak delta pm30 for positive number and when absolute value is greater than W90,
K3 increases by 1 time, and k4 is constant；Electricity contributes 30 seconds peak delta pm30 to be negative or when absolute value is less than W90, and k3 is constant, and k4 increases
Add primary；
15 seconds performance factor B=k1/ (k1+k2) of primary frequency modulation；
30 seconds performance factor C=k3/ (k3+k4) of primary frequency modulation, evaluation period h are higher than 15 seconds and are lower than 30 seconds, 30 seconds
Performance factor not counts.
In the present invention, previous examination is solved using the powerful data-handling capacity of control system by rapidity evaluation method
It is not perfect to test data, search function can be used, provides foundation for further research frequency modulation characteristic；Response calculates within 15 seconds, reason
The hysteresis of unit frequency quick response is considered as reference using the mean value of preceding 15 seconds frequencies variation by the calculating of value；30 seconds
Response calculates, and the calculating of theoretical value, as reference, avoids falling bring after rise because of frequency using the peak value of preceding 30 seconds frequencies variation
Analytical error；In order to avoid frequently calculating, according to previous unit frequency modulation test feature, frequency modulation rapid charater can after 15s
It fully demonstrates, so setting evaluation period shortest length, can be improved the reasonability of statistical data；Unit is calculated over 15s not
Reach 30 seconds, replaces two item datas only with 15 seconds calculating data；If sampling duration exceed 30 seconds, epicycle calculate according to
Actual frequency is fallen after rise to could terminate in dead zone, and theoretical action value will be referred to the peak value of entire period.
Claims (1)
1. one kind is based on primary frequency modulation rapidity evaluation method, it is characterised in that: the following steps are included:
(1) the grid-connected power generator turbine revolving speed of timing acquiring, is converted to mains frequency for revolving speed；
(2) the deviation of mains frequency and standard frequency is calculated, and result is subjected to signed magnitude arithmetic(al)；
(3) when absolute value of the bias is greater than the set value, then next step is entered；
Otherwise, step is returned to (1)；
(4) when absolute value of the bias is reduced to setting value, this Phase Evaluation terminates, minute book phases-time length；Otherwise, continue to count
When；
(5) when time span is greater than 15 seconds, the data of this phase acquisition are analyzed, obtain evaluation number；
When time span is less than or equal to 15 seconds, step is returned to (1)；
Setting value is 0.034Hz；
Turbine speed w is converted to mains frequency f:f=w/60；
Mains frequency f and standard frequency f0 absolute value of the bias: Δ f=∣ f-f0 ∣；
Time span h: stop from absolute value of the bias Δ f is greater than the 0.034Hz moment to less than equal to the 0.034Hz moment；
Electricity contributes deviation: Δ p=p-p0；
Electricity contributes 15 seconds peak values: Δ pm15=max ∣ Δ p15 ∣, and wherein Δ p15 indicates that value range is Δ p number in first 15 seconds
According to；
Electricity contributes 30 seconds peak values: Δ pm30=max ∣ Δ p30 ∣, and wherein Δ p30 indicates that value range is Δ p number in first 30 seconds
According to；
Unit rated power is pe, unit MW；
Electricity contributes 75 theoretical peaks: W75=0.3* Δ f1*pe, and wherein Δ f1 is preceding 15 seconds frequency difference average value；
Electricity contributes 90 theoretical peaks: W90=0.36* Δ f2*pe, and wherein Δ f2 is entire evaluation period maximum value；
When mains frequency is greater than standard frequency, electricity contributes 15 seconds peak delta pm15 for negative and when absolute value is greater than W75, meter one
Correct action frequency k1 increases by 1 time within secondary frequency modulation 15 seconds, and 15 seconds malfunction number k2 of primary frequency modulation are constant；Electricity contributes 15 seconds peaks
When to be worth Δ pm15 be that positive number or absolute value are less than W75, k1 is constant, and k2 increases primary；
When mains frequency is less than standard frequency, electricity contributes 15 seconds peak delta pm15 for positive number and when absolute value is greater than W75, and k1 increases
Add 1 time, k2 is constant；Electricity contributes 15 seconds peak delta pm15 to be negative or when absolute value is less than W75, and k1 is constant, and k2 increases by one
It is secondary；
When mains frequency is greater than standard frequency, electricity contributes 30 seconds peak delta pm30 for negative and when absolute value is greater than W90, meter one
Correct action frequency k3 increases by 1 time within secondary frequency modulation 30 seconds, and 30 seconds malfunction number k4 of primary frequency modulation are constant；Electricity contributes 30 seconds peaks
When to be worth Δ pm30 be that positive number or absolute value are less than W90, k3 is constant, and k4 increases primary；
When mains frequency is less than standard frequency, electricity contributes 30 seconds peak delta pm30 for positive number and when absolute value is greater than W90, and k3 increases
Add 1 time, k4 is constant；Electricity contributes 30 seconds peak delta pm30 to be negative or when absolute value is less than W90, and k3 is constant, and k4 increases by one
It is secondary；
15 seconds performance factor B=k1/ (k1+k2) of primary frequency modulation；
30 seconds performance factor C=k3/ (k3+k4) of primary frequency modulation, evaluation period h are higher than 15 seconds and are lower than 30 seconds, and 30 seconds correct
Movement rate not counts.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110797914A (en) * | 2019-11-11 | 2020-02-14 | 国网河南省电力公司电力科学研究院 | Rapid frequency control method and system for new energy station |
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| CN103545840A (en) * | 2013-10-23 | 2014-01-29 | 国家电网公司 | Method capable of guaranteeing primary frequency modulation action effectiveness of 300MW generator set |
| CN105445582A (en) * | 2015-11-26 | 2016-03-30 | 广东电网有限责任公司电力科学研究院 | Interconnection power grid primary frequency modulation responding performance assessment method |
| CN106300389A (en) * | 2016-08-22 | 2017-01-04 | 国家电网公司 | A kind of integrated evaluating method of generating set primary frequency regulation performance |
| CN107546754A (en) * | 2017-09-25 | 2018-01-05 | 国网河南省电力公司电力科学研究院 | The lower frequency response merit rating method of interconnected network of extra-high voltage high-power missing |
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2018
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US20120232820A1 (en) * | 2009-11-18 | 2012-09-13 | Douglas Wilson | grid oscillation analysis method and apparatus therefor |
| CN103545840A (en) * | 2013-10-23 | 2014-01-29 | 国家电网公司 | Method capable of guaranteeing primary frequency modulation action effectiveness of 300MW generator set |
| CN105445582A (en) * | 2015-11-26 | 2016-03-30 | 广东电网有限责任公司电力科学研究院 | Interconnection power grid primary frequency modulation responding performance assessment method |
| CN106300389A (en) * | 2016-08-22 | 2017-01-04 | 国家电网公司 | A kind of integrated evaluating method of generating set primary frequency regulation performance |
| CN107546754A (en) * | 2017-09-25 | 2018-01-05 | 国网河南省电力公司电力科学研究院 | The lower frequency response merit rating method of interconnected network of extra-high voltage high-power missing |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110797914A (en) * | 2019-11-11 | 2020-02-14 | 国网河南省电力公司电力科学研究院 | Rapid frequency control method and system for new energy station |
| CN110797914B (en) * | 2019-11-11 | 2022-06-03 | 国网河南省电力公司电力科学研究院 | Rapid frequency control method and system for new energy station |
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Address after: No. 8, Haitai Huake 4th Road, Huayuan Industrial Zone, High tech Zone, Binhai New Area, Tianjin, 300384 Patentee after: ELECTRIC POWER SCIENCE & RESEARCH INSTITUTE OF STATE GRID TIANJIN ELECTRIC POWER Co. Patentee after: STATE GRID TIANJIN ELECTRIC POWER Co. Patentee after: STATE GRID CORPORATION OF CHINA Address before: No.8, Haitai Huake 4th Road, Xiqing District, Tianjin 300384 Patentee before: ELECTRIC POWER SCIENCE & RESEARCH INSTITUTE OF STATE GRID TIANJIN ELECTRIC POWER Co. Patentee before: STATE GRID TIANJIN ELECTRIC POWER Co. Patentee before: STATE GRID CORPORATION OF CHINA |
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